Nope. That's way too late. They are cast out in Rev 12 before the great trib begins. The 7th trump is when Christ leaves heaven to come to the Earth to end the reign of the beast and the AC.
You need to try and put events on the 7year timeline, instead of just talking about them in a fragmented manner.
In the days of the 7th trumpet the mystery of God declared to the prophets should be finished. The mystery of God is the setting up of the Kingdom of God here on earth.
Revelation 10:7 But in the days of the voice of the seventh angel, when he shall begin to sound, the mystery of God should be finished, as he hath declared to his servants the prophets.
When the 7th trumpet sounds it is a time, times, half time before Jesus descends to earth. You are not understanding the language in Revelation 11:
15 And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world
are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever
"are become" means that the kingdoms of this world are about to be removed from Satan's control. it starts with the casting down of Satan and his angels, the dismantling of their kingdom beginning.
When Satan and his angels are cast down to earth, the time of the bowls of wrath, in Revelation 16, begin to take place during the second half of the 7 years, as the kingdom of the beast and the ten kings is also dismantled.
17 Saying, We give thee thanks, O Lord God Almighty, which art, and wast, and art to come; because thou hast taken to thee thy great power, and hast reigned.
18 And the nations were angry,
and thy wrath is come, and the time of the dead, that they should be judged, and that thou shouldest give reward unto thy servants the prophets, and to the saints, and them that fear thy name, small and great; and shouldest destroy them which destroy the earth.
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